Toothbrush



FIG. 1 is a perspective view of a toothbrush, embodying our new design;

FIG. 2 is a is a side elevational view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is an opposite side elevational view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a toothbrush, as shown and described. 